Pipe or flue expander



Oct. 6,1 2 1,556,387

H. E. WILLIAMS PIPE 0R FLUE EXPANDER Filed March 20, 1924 2 Sheets-Sheet 1 flan/ 9151 f/Qllia INVENTOR BY Q W ATTO R N EY H. E. WILLIAMS Oct. 6 1925. 1,556,387

PIPE OR FLUE EXPANDER Filed March 0. 1924 2 Sheets-Sheet 2 1 1 63 5 [WI/farms, 'NVEN-TOR BY W ATTORNEY Patented Oct.

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Be. it known that IQHARvEY E. NVIIQTJIAMQ alcitizen of the United Statearesidingat specification.

st; Joseph; ia heeotinty or Buchanan and. State ofMissoufi, have inventedcertain new and [useful Improvements 1 i Pip e-jor Flue EXp r iof which t ef l Wi ii e .This invention relates pipe; ex; P 1

The primary object of this invention is; the

pI'OVlSlOn, in a mantras. hereinafteriset forth, of a flue expanderphaving. thelimproved means for expanding 'the'endiof a flue by the action" of rolling. members positioned therein, whereby an; accurate 1 and equal expansion of the flue will belhad throughout its circumference; i

A further obect provision, f in a l manner as hereinafter set fortlnofafluei expandermaking fuse ofa mandrel havin a b odyfportion of-"equall'di the invention ;.ameter "throng outl and carrying thereon bearings supporting. :a series pf tapering rollers which rollers bear against thei man drel 'and are, caused to" revolve the'opposite directionto the mandrel when the same z is turned to expand the tube, in the device is placed.

- A final object of theinventionjis the-pro:

vision, 1n a manner as hereinafter-"set forth,

of a tube expander ofzsimple and sturdy construction, strong, durable, and inexpensivetoimanufacture. I e

The inventionmwill be best 'understood from aconsideration of-the following de tailed description. taken in connection ;;with

i the; accompanying drawings forming part of this specification with the understanding that, the invention is not'confined; to'any strict conformitywith the showing of the drawings but maybe changed and modified so long as suchchangesand modifications 'of the roller members.

Figure 4 is a detail perspective view of the mandrel. I

are (a .awsxmm;

Q L 'e fo th b i eibo supporting the rollers. f I Figure 6 is an end view of a roller beari iboxa sed to 010 Figure 5 is a detail perspective Fig r 7' i I nsverse sectional. i

Oil-Figure Y6 c Figure 8 .is"an end viewfoia bearing pl'ate supporting' the forward end of the" rollers, igure;-9 is a; transverse sectional view of w en e if Figlii'e H which engages the inandrel and holds theas sembled device. together. i Figur 11 is'ya side. elevation ofv the same.

1 is sad eitaaoaoi the but Referring ,nowto the drawings in detail wherein like 'numerals of reference indicate corresponding parts throughoutthe several views of the drawings the device embody ing this invention comprises a mandrel-indicated; as a whole at .1 This mandrel-comprises Ian elongated bodyportion 1? of equal diameter throughoutand the forward end this .body fpo'rti on is reducedfa's at 2am] 1s peripherally'threaded asindic'atedat 3. T

rear? portion of the hody l has. a portion ief 5;

substantial length "and of greater diameter than: the body 1 and this portioniprovides a bearing surface'I for a part. of. the device t v be described hereafter. The bearing phi:

tion 4 merges intoasecond bearing portion 1.

of less length but of greater diameter. than the first mentioned bearing portion this second bearing portion 5 also carriesa part of thefdevice Itobe hereinafter referred to;

Surrounding the mandrel at the. .rear .of the second. 'mentioned bearing portion '55. is (an enlarged annular collar 6 .againstf the inner surface"? of which the structure carried upon the bearing ,5] abuts. This "collar 6' has rormea u oa its'.outer face a'squaredhead 8means of which the mandrel can'be en gaged y a wrench or other suitable and be revolved.

I device,

Adapted to be positioned upon the first mentioned bearing surface 4 of the mandrel; 4-,

' isa circularbearing box 9, one face ofwhich has a shallow circular depression 1 0 out therein, this. depression being of slightly less diameter than the diameter of the box thus forming the flange 11 extending around the eriphery of the bearing upon one side thereof. The bearing 9 has formed through the central portion thereof a circular bore 12 through which the bearing surface 4 of the mandrel extends, and the bearing box 9 further has formed longitudinally therethrough radial recesses 13, these recesses extending from and opening into the central passage 12 outwardly to a point in alinement with the inner .face of the flange 11 and further are of semi-circular contour at their outer ends as indicated at 14 in Figure 6 of the drawings. When the circular bearing box 9 is placed upon the mandrel 1 the recessed portion 10 is spaced toward the rear of the mandrel. However, before the bearing box 9 is placed in position a cap member 15 having a central aperture 16 'therethrough is threaded onto the mandrel and the central aperture 16 is of equal diameter to the hearing surface 5 of the mandrel and the capis positioned thereon. One face of the cap 15 has the circular upstandin'g portion 17 thereon and this portion is of less diameter than the diameter of the cap thus forming the shoulder '18. This shoulder and raised portion faces the forward end of the mandrel and when the circular bearing box 9 is placed in position upon the bearing surface 4: the flange 11 of the bearing box fits over the shoulder 18 above the cap member 15 and thusthe cap closes the outer side of the radial openings 13 in the bearing x 9- Adapted to roll upon the body portion 1 of the mandrel is a series of tapered rollers 19 eachhaving a trunnion on each end. The forward end of the roller, which is the small end, is provided with the short trunnion 20 while the rear end of the roller is provided with a substantially elongated trunnion 21. These long'trunnions 21 which extend from the large end of the tapered roller 19 are each adapted to be positioned within one of the recesses 13 in the bearing box 9.

Each of the short trunnions 20 at the small end of the tapered roller 19 is positioned in an aperture 22 formed through a plate 23 at diametrically opposed points as clearlyshown in Figure 8 of the drawings. This plate further has formed centrally therethrough the passage 24 for the passage of the tapered end 2 of the mandrel. \Vhen the plate 23 is positioned upon the tapered end 2 of the mandrel it abuts the forward end of the body portion 1 of the mandrel, and after the plate is so positioned with the rollers each having its short trunnion through one of the apertures 22 and its long trunnion through thepassa'ges 13, a nut 25 is threaded upon the threaded end 3 of the reduced portion 2 until it engages the outer face of the plate 23 and acts to bind the same against the end of the body portion 1*.

WVhen the pipe expander is assembled as above described and the plate 23 secured in position by the nut 25 as set forth the plate 23 will be held stationary, whereas the bear ing box 9 will be free to rotate slightly upon the bearing surface 4 and as thetapered rollers 19 rest fiat upon the body .1 the revohn tion of the mandrelwhen the devicev is in position in a tube will cause the plate 23 to move with the mandrel whereas the bearing box 9 will not move immediately but will remain stationary until the rollers .19 assume the position as shown in Figure 2 whereupon a twisting" spreading action will be had against the inner surface of the pipe and as the mandrel is continually turned and driven into the .pipe at the same time thepipe end will be evenly expanded to the desired ex tent.

Having thus described my invention what I claim is:

1. In a pipe expander, a mandrel having a substantially elongated body portion of equal diameter throughout and further having a portion thereof formed to provide a bearing, a bearing box encasing said bearing, said box having radial through passages extending from the center thereof, a fixed apertured bearing plate upon said mandrel, and revoluble trunnioned rollers extending between said plate and bearing box and hearing against said body portion, each roller having one trunnion in an aperture in said plate and another trunnion in one of said through passages.

2. In a pipe expander, a mandrel having a substantially elongated body portion of equal diameter throughout and further having a portion thereof formed to provide a bearing, a bearing box enoasing said bearing, said box having radial through passages extending from the center thereof, a fixed apertured bearing plate upon said mandrel, revoluble tru'nnio'ned rollers extending between said plate and bearing box and bearing against said body portion, each roller having one trunnion in an aperture in said plate and another trunnion in one of said through passages, and a cover plate removably carried by said mandrel rearwardly of said bearing box and closing said through passages. I

In testimony whereof, I afiix my signature hereto.

HARVEY E. WILLIAMS. 

